Intervertebral prosthesis
First Claim
1. An implant comprising an elongated, elastic body which is form-elastic and which takes on a form of a spiral in a force-free state, and comprising hydrogel members that are held in grooves at a bottom or at a side of the body and which follow the spiral, whereby hydrogel members that are affixed to the body in a dehydrated state have the possibility to enlarge their volume after implantation.
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Accused Products
Abstract
The invention deals with an implant, in particular, an intervertebral prosthesis, which consists of an elongated elastic body which is form-elastic and takes on the form of a spiral S in the force-free state. The spiral can be drawn by a reverse winding up into an insertion instrument which is only unsubstantially larger in the insertion region than the cross-section of the elongated elastic body in order to reach the inner space of an intervertebral disc through a small opening in the annulus fibrosus and to push in and sever off the self-winding spiral when the interior is filled. This has the advantage that inner spaces of differing sizes can be filled with the same spiral.
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Citations
5 Claims
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1. An implant comprising an elongated, elastic body which is form-elastic and which takes on a form of a spiral in a force-free state, and comprising hydrogel members that are held in grooves at a bottom or at a side of the body and which follow the spiral, whereby hydrogel members that are affixed to the body in a dehydrated state have the possibility to enlarge their volume after implantation.
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2. An intervertebral prosthesis for replacement of a nucleus of an intervertebral disk, the prosthesis having an elongated elastic body, which is form-elastic and which rolls up by itself into a form of a plane, circular and form-fitted spiral in a force-free state;
- said body comprising a hydrogel apparatus for enlarging a height H of the spiral after implantation wherein the hydrogel apparatus comprises hydrogel members held in grooves at a bottom or at a side of the body and which follow the spiral.
- View Dependent Claims (3, 4, 5)
Specification